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Cheap flights from Idaho to London from £226

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Idaho to London

Enter your travel dates to find the best prices.

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 February 2026.

Mon 2/314:40
BOI
-
LHR
2 stops19h 10m
Lufthansa
Mon 9/306:35
LHR
-
BOI
2 stops20h 54m
Lufthansa
Deal found 31/1£456
Wed 4/313:44
GEG
-
LHR
2 stops18h 06m
Lufthansa
Wed 11/306:35
LHR
-
GEG
2 stops21h 43m
Lufthansa
Deal found 1/2£456
Wed 4/306:00
GEG
-
LGW
2 stops19h 00m
American Airlines
Mon 9/312:30
LGW
-
GEG
2 stops30h 14m
American Airlines
Deal found 1/2£457
Tue 3/307:00
GEG
-
LHR
2 stops17h 30m
Multiple Airlines
Tue 10/307:40
LHR
-
GEG
2 stops20h 38m
Multiple Airlines
Deal found 2/2£463
Mon 2/313:38
JAC
-
LHR
1 stop16h 52m
United Airlines
Mon 9/307:40
LHR
-
JAC
2 stops19h 14m
United Airlines
Deal found 31/1£464
Mon 2/318:55
BOI
-
LHR
1 stop34h 05m
United Airlines
Mon 9/307:40
LHR
-
BOI
2 stops19h 49m
United Airlines
Deal found 31/1£464
Wed 4/305:00
GEG
-
LHR
1 stop20h 40m
United Airlines
Wed 11/306:35
LHR
-
GEG
2 stops21h 43m
United Airlines
Deal found 1/2£464
Thu 5/305:00
GEG
-
LHR
2 stops18h 10m
United Airlines
Sat 14/306:35
LHR
-
GEG
2 stops21h 28m
United Airlines
Deal found 1/2£466
Wed 18/305:00
GEG
-
LHR
2 stops17h 55m
United Airlines
Wed 25/306:35
LHR
-
GEG
2 stops21h 28m
United Airlines
Deal found 1/2£467
Wed 4/305:50
BOI
-
LHR
2 stops19h 15m
Delta
Wed 11/308:40
LHR
-
BOI
2 stops18h 29m
Delta
Deal found 1/2£467
Tue 17/313:37
GEG
-
LHR
1 stop13h 03m
United Airlines
Tue 24/311:10
LHR
-
GEG
2 stops40h 53m
United Airlines
Deal found 31/1£472
Tue 7/410:40
IDA
-
LHR
1 stop18h 40m
United Airlines
Tue 14/407:25
LHR
-
IDA
2 stops33h 28m
United Airlines
Deal found 1/2£475

Find flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated 2 February 2026.

Round-trip from

£456

One-way from

£226

Popular in

June

Cheapest in

October

Average price

£598
Lufthansa
  • Lufthansa
  • 2/3-9/3
  • 4 total stops
  • 40h 04m total
  • Idaho to London
Search Deals
5/5
  • 5/5
  • 3 total stops
  • 23h 05m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£141 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Idaho to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Idaho

Fly to

London

Route

Depart

Return

Price

SpokaneLondon

GEG - LGW

GEGLGW

Spokane

Wed 4/3

06:00-09:00

2 stops19h 00m

London Gatwick

Mon 9/3

12:30-11:44

2 stops30h 14m

£457

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Mon 2/3

13:38-13:30

1 stop16h 52m

London Heathrow

Mon 9/3

07:40-20:54

2 stops19h 14m

£464

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 5/3

12:42-07:25

1 stop34h 43m

London Heathrow

Sat 14/3

06:35-21:03

2 stops21h 28m

£464

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 5/3

06:00-05:55

1 stop15h 55m

London Heathrow

Tue 10/3

06:35-21:18

2 stops45h 43m

£464

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 3/3

07:00-05:55

1 stop14h 55m

London Heathrow

Tue 10/3

06:35-21:03

2 stops21h 28m

£464

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 11/5

11:05-12:10

1 stop17h 05m

London Heathrow

Wed 20/5

11:45-21:13

2 stops17h 28m

£475

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 10/5

05:05-12:10

1 stop23h 05m

London Heathrow

Wed 20/5

09:55-21:13

2 stops19h 18m

£475

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sat 9/5

17:36-12:10

1 stop34h 34m

London Heathrow

Wed 20/5

08:40-21:13

2 stops20h 33m

£475

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 5/5

14:31-09:40

1 stop12h 09m

London Heathrow

Fri 15/5

06:55-09:55

2 stops34h 00m

£475

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 7/4

10:40-12:20

1 stop18h 40m

London Heathrow

Tue 14/4

07:25-09:53

2 stops33h 28m

£475

Flights are sorted by cheapest return flights first.

Deals found on 2/2

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London

What is the cheapest month to book a flight from Idaho to London?

Currently, October is the cheapest month in which you can book a flight from Idaho to London (average of £454). Flying from Idaho to London in June is currently the most expensive (average of £792). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Idaho to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Idaho to London?

    A quick flight from Idaho to London can take about 16h 52m. American Airlines provides one of the quickest options available for as low as £464. The distance from Idaho to London is about 4658 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from Idaho to London?

    While some choose either Spokane - London Heathrow or Boise Air Term. Gowen Fld - London Gatwick, Boise Air Term. Gowen Fld - London Heathrow is the most popular route from Idaho to London.

  • Can I find deals for flights from Idaho to London that include hotel bookings?

    Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Idaho to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.

  • Can I find deals for business class flights from Idaho to London?

    Yes. Cheapflights offers flight deals from Idaho to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to London?

    Currently, October is the cheapest month in which you can book a flight from Idaho to London (average of £454). Flying from Idaho to London in June is currently the most expensive (average of £792). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames
Romford
Ipswich

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Fly with Cheapflights

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How does Cheapflights help users find flights from Idaho to London?

When you search for this flight from Idaho to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Idaho to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Idaho to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Idaho to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho to London flexibly with Cheapflights today.

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Of course! You can now track prices for flights from Idaho to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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